Fox, Irving, and Delfín de León. “Failure of Carbaryl-Based Products to Reduce Brown Dog Tick Populations in Puerto Rico”. The Journal of Agriculture of the University of Puerto Rico 70, no. 4 (October 1, 1986): 299–302. Accessed November 22, 2024. https://revistas.upr.edu/index.php/jaupr/article/view/7107.